To compute the minimum sample size for an interval estimate of μ when the population standard deviation is known, we must first determine all of the following EXCEPT _____.
A) desired margin of error
B) confidence level
C) population standard deviation
D) degrees of freedom

Question

Quizplus · Accepted Answer

Degrees of freedom are only necessary when calculating sample size for estimating the population standard deviation. When the population standard deviation is known, we only need to know the desired margin of error and confidence level to compute the minimum sample size.

To Compute the Minimum Sample Size for an Interval Estimate